Bacteria-based self-healing concrete for application in the marine environment

Bacteria-based self-healing concrete for application in the marine environment

Palin, D.
Wiktor, V.
Jonkers, H.M.

Civil Engineering and Geosciences

Structural Engineering

2013-06-16

Marine concrete structures are exposed to one of the most hostile of natural environments. Many physical and chemical phenomena are usually interdependent and mutually reinforcing in the deterioration of marine exposed concrete: expansion and microcracking due to physical effects increases concrete permeability paving the way for harmful chemical interactions between seawater, concrete and embedded steel reinforcement. Early research in self-healing concrete has focused on the autogenous ability of hydrates to heal cracks over time, this form of healing is however restricted to early and small cross sectional crack width reductions, while limited research is available on the autogenous healing of concrete incorporating GBFS (Ground blast furnace slag). A novel approach to self-heal concrete is a bioinspired technique, where bacteria immobilized in the concrete are activated through crack induced water ingress, forming a mineral healing precipitate [1]. The current study characterises the autogenous healing of blast furnace slag cement (CEM III/B 42.5 N) mortar cubes submerged in both fresh- and synthetic sea- water, as the first step towards developing a bacteria-based self-healing concrete for application in the marine environment.

bacteria
self-healing
marine environment
concrete
cracks

http://resolver.tudelft.nl/uuid:cd5dca54-ecdc-4121-a531-810343d812e5

Magnel Laboratory for Concrete Research

9789082073713

uuid:3078d20c-2173-4c13-a4d7-106207c78577

ICSHM 2013: Proceedings of the 4th International Conference on Self-Healing Materials, Ghent, Belgium, 16-20 June 2013

Institutional Repository

conference paper

(c) 2013 The Author(s)